Object: UGC02691 On scan num: 2075 2077 2079 Off scan num: 2076 2078 2080 R.A.: 3.345952 hrs Dec.: -1.049424 deg On azimuth: 155.586486 deg On zenith dist.: 42.073077 deg Off azimuth: 155.550760 deg Off zenith dist.: 42.081553 deg MJD: 52598 UTC: 0.150961 Center freq.: 1390.692328 MHz Doppler: -0.00001749 Num. correlators: 2 Spectrom. atten.: 38 34 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 840 seconds
This spectrum is the integration of all data for the scan with spectra from both polarizations added together. The spectral intensities are Ssys * (on - off) / off, where Ssys is the system temperature in Jy. The system noise flux density equivalent is calibrated for each scan with a calibration noise source firing during each scan. The cal value, in Jy, is calibrated by comparison with a number of continuum sources as described in the summary web page
This spectrum is the same as Figure 1 but with 2 60-second sub-integrations manually deleted because of interference or a bad baseline.
This is the section of spectrum measured to obtain the parameters listed below. The three horizontal dotted lines are the baseline, the peak level selected, and 20% of the peak level. The two vertical dotted lines mark the selected 20% line width edges. The solid horizontal line marks the velocity range chosen for the the line profile flux density integral. This spectrum has a second-order least squares fit baseline removed using most of the baseline shown in Figure 2.
Peak intensity: 0.025 Jy Lower 20% velocity: 6108.6 km/s Upper 20% velocity: 6492.0 km/s Systemic velocity: 6300.3 km/s Line width (20%): 383.4 km/s Profile integral: 7.08 Jy * km/s A: 7.03 B: 7.09 Ratio B/A: 1.010 Flux integral velocity range: 6070.4 - 6520.6 km/s